Initial project setup - Phases 1-3 complete

PacketTunnel/PacketTunnelProvider.swift

@@ -0,0 +1,50 @@
+import NetworkExtension
+import ProxyCore
+
+class PacketTunnelProvider: NEPacketTunnelProvider, @unchecked Sendable {
+    private var proxyServer: ProxyServer?
+
+    override func startTunnel(options: [String: NSObject]? = nil) async throws {
+        // Start the local proxy server
+        let server = ProxyServer()
+        try await server.start()
+        proxyServer = server
+
+        // Configure tunnel to redirect HTTP/HTTPS to our local proxy
+        let settings = NEPacketTunnelNetworkSettings(tunnelRemoteAddress: "127.0.0.1")
+
+        let proxySettings = NEProxySettings()
+        proxySettings.httpServer = NEProxyServer(
+            address: ProxyConstants.proxyHost,
+            port: ProxyConstants.proxyPort
+        )
+        proxySettings.httpsServer = NEProxyServer(
+            address: ProxyConstants.proxyHost,
+            port: ProxyConstants.proxyPort
+        )
+        proxySettings.httpEnabled = true
+        proxySettings.httpsEnabled = true
+        proxySettings.matchDomains = [""] // Match all domains
+        settings.proxySettings = proxySettings
+
+        // DNS settings to ensure proper resolution
+        let dnsSettings = NEDNSSettings(servers: ["8.8.8.8", "8.8.4.4"])
+        dnsSettings.matchDomains = [""] // Match all
+        settings.dnsSettings = dnsSettings
+
+        try await setTunnelNetworkSettings(settings)
+
+        IPCManager.shared.post(.extensionStarted)
+    }
+
+    override func stopTunnel(with reason: NEProviderStopReason) async {
+        await proxyServer?.stop()
+        proxyServer = nil
+        IPCManager.shared.post(.extensionStopped)
+    }
+
+    override func handleAppMessage(_ messageData: Data) async -> Data? {
+        // Handle IPC messages from the main app
+        return nil
+    }
+}